ProjectExplorer: Simplify BuildStepFactory

De-QObject-ify class, tr contexts are now the product's
context, which was the case in some BuildStepFactories already,
and is current state in {Run,DeployConfiguration}Factory.
One spurious object name removed.

De-virtualize canHandle(), it was never overloaded and is not
intended to be overloaded anymore.

Remove unused clone() function.

Change-Id: Iff7fba5f707505f868f94458084a18650535fa23
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/ios/iosdeploystepfactory.cpp

@@ -36,7 +36,7 @@ namespace Internal {
 IosDeployStepFactory::IosDeployStepFactory()
 {
     registerStep<IosDeployStep>(IosDeployStep::Id);
-    setDisplayName(tr("Deploy to iOS device or emulator"));
+    setDisplayName(IosDeployStep::tr("Deploy to iOS device or emulator"));
     setSupportedStepList(ProjectExplorer::Constants::BUILDSTEPS_DEPLOY);
     setSupportedDeviceTypes({Constants::IOS_DEVICE_TYPE, Constants::IOS_SIMULATOR_TYPE});
     setRepeatable(false);

src/plugins/ios/iosdeploystepfactory.h

@@ -32,8 +32,6 @@ namespace Internal {
 
 class IosDeployStepFactory : public ProjectExplorer::BuildStepFactory
 {
-    Q_OBJECT
-
 public:
     IosDeployStepFactory();
 };

src/plugins/ios/iosdsymbuildstep.h

@@ -90,7 +90,6 @@ private:
 
 class IosDsymBuildStepFactory : public ProjectExplorer::BuildStepFactory
 {
-    Q_OBJECT
 public:
     explicit IosDsymBuildStepFactory();
 };